Statistics: The Art and Science of Learning from Data (4th Edition)
4th Edition
ISBN: 9780321997838
Author: Alan Agresti, Christine A. Franklin, Bernhard Klingenberg
Publisher: PEARSON
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Chapter 15.1, Problem 5PB
a.
To determine
Interpret the point estimate.
b.
To determine
Interpret the 95.9% confidence interval.
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Research indicates that there may be a relationship between caffeinated coffee consumption and risk of depression in women. Provided is data on the amount of caffeinated coffee consumed and whether the woman was diagnosed with clinical depression. Of interest is to see if there is evidence of an association between caffeinated coffee intake and clinical depression in women. Using the provided output, what is the pvalue and what are the results of the test?
Caffeinated coffee
Depression
<1 cup/wk
>=1 cup/day
2-3 cups/day
4+ cups/day
Total
Yes
670
1278
564
95
2607
No
11545
22573
11726
2288
48132
Total
12215
23851
12290
2383
50739
Pearson's Chi-squared testdata: coffeeX-squared = 19.472, df = 3, p-value = 0.0002184
A. pvalue=3 <= alpha(0.05), H0 is rejected. There is an association between depression and caffeine intake in women
B. pvalue=19.472 <= alpha(0.05), H0 is rejected. There is an association between depression and caffeine intake in…
The data in NutritionStudy include information on nutrition and health habits of a sample of 315 people. One of the variables is
VitaminUse, indicating whether a person takes a multivitamin pill regularly or occasionally or not at all. Use technology to test
whether the data provide evidence that the proportion taking a vitamin pill regularly is different from 35 % given.
Clearly state the null and alternative hypotheses.
:
: 42
: Pi
: P2
:: 0.35
: 2
:: P1
: p2
::
:: r
Ho:
vs Hg:
::
The slope of a regression line is 0.8, and the standard error of the slope is 0.3. The sample used to compute this regression line consisted of 12 participants. Compute the 95% confidence interval for the slope. Type the upper limit of the confidence interval?
Chapter 15 Solutions
Statistics: The Art and Science of Learning from Data (4th Edition)
Ch. 15.1 - Prob. 1PBCh. 15.1 - Prob. 2PBCh. 15.1 - Prob. 3PBCh. 15.1 - Prob. 4PBCh. 15.1 - Prob. 5PBCh. 15.1 - Prob. 6PBCh. 15.1 - Prob. 7PBCh. 15.2 - How long do you tolerate being put on hold?...Ch. 15.2 - Prob. 9PBCh. 15.2 - Prob. 10PB
Ch. 15.2 - Cell phones and reaction times Example 13 in...Ch. 15.2 - Sign lest for GRR scores Consider Example 8, for...Ch. 15.2 - Prob. 13PBCh. 15.2 - More on blood pressure Refer to the previous...Ch. 15.2 - Prob. 15PBCh. 15.2 - Prob. 16PBCh. 15 - Car bumper damage An automobile company compares...Ch. 15 - Comparing more bumpers Refer to the previous...Ch. 15 - Telephone holding times In Exercise 15.8, the...Ch. 15 - Treating alcoholics The nonparametric statistics...Ch. 15 - Comparing tans Examples 1 and 2 compared two...Ch. 15 - Comparing therapies for anorexia The Anorexia data...Ch. 15 - Internet versus cell phones For the countries in...Ch. 15 - Prob. 24CPCh. 15 - GPAs The Georgia Student Survey data file has data...Ch. 15 - Prob. 26CPCh. 15 - Prob. 27CPCh. 15 - Student survey For the FL Student Survey data file...Ch. 15 - Prob. 29CPCh. 15 - Prob. 30CPCh. 15 - Complete the analogy The t test for comparing two...Ch. 15 - Prob. 32CPCh. 15 - True or false For a one-sided significance test...Ch. 15 - Multiple choice Nonparametric statistical methods...Ch. 15 - Prob. 35CPCh. 15 - Prob. 36CPCh. 15 - Prob. 37CP
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